Surface pattern on sponge



FIG. 1 is a perspective view of a surface pattern on sponge showing the new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is an enlarged view of a section of FIG. 1.

The portions of the surface pattern on sponge in FIGS. 1-8 shown in broken lines are included to show features that form no part of the claimed design. 

CLAIM The ornamental design for a surface pattern on sponge, as shown and described. 